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2. Is Central Air Worth the Cost? Plus, What You Can Do Instead

   www.aol.com/central-air-worth-cost-plus...

   However, the costs of both installing and running central AC can be quite steep. We spoke with experts to find out whether central air is worth the cost, and what some alternatives might be ...

3. What are the most common home maintenance costs? - AOL

   www.aol.com/finance/most-common-home-maintenance...

   Air quality matters in your home and giving your HVAC system a regular cleaning helps. According to Home Advisor, the average cost of cleaning your air ducts ranges from $269 to $506. While you ...

4. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   Central, "all-air" air-conditioning systems (or package systems) with a combined outdoor condenser/evaporator unit are often installed in North American residences, offices, and public buildings, but are difficult to retrofit (install in a building that was not designed to receive it) because of the bulky air ducts required. [32] (Minisplit ...

5. Seasonal energy efficiency ratio - Wikipedia

   en.wikipedia.org/wiki/Seasonal_energy_efficiency...

   Air-conditioner sizes are often given as "tons" of cooling, where 1 ton of cooling equals 12,000 BTU/h (3.5 kW). 1 ton of cooling equals the amount of power that needs to be applied continuously over a 24-hour period to melt 1 ton of ice. The annual cost of electric energy consumed by an air conditioner may be calculated as follows:

6. Automatic balancing valve - Wikipedia

   en.wikipedia.org/wiki/Automatic_balancing_valve

   Although the capital costs of installing a constant flow system are relatively low, the manual balancing required is time-consuming, complicated, laborious and system is inefficient. This results in higher running costs and subsequently resulting in higher CO 2 emissions. Since most air-conditioning and water distribution systems only reach ...

7. AOL MySubscriptions

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   Manage your AOL subscriptions by signing in. Don’t have an AOL subscription yet? Sign up today and come back to manage all of your subscriptions in a single location.